55211233440 has 96 divisors (see below), whose sum is σ = 189725893056. Its totient is φ = 13384540160.

The previous prime is 55211233351. The next prime is 55211233447. The reversal of 55211233440 is 4433211255.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55211233398 and 55211233407.

It is not an unprimeable number, because it can be changed into a prime (55211233447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5223057 + ... + 5233616.

It is an arithmetic number, because the mean of its divisors is an integer number (1976311386).

Almost surely, 2^55211233440 is an apocalyptic number.

It is an amenable number.

55211233440 is an abundant number, since it is smaller than the sum of its proper divisors (134514659616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55211233440 is a wasteful number, since it uses less digits than its factorization.

55211233440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10456702 (or 10456694 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 55211233440 its reverse (4433211255), we get a palindrome (59644444695).

The spelling of 55211233440 in words is "fifty-five billion, two hundred eleven million, two hundred thirty-three thousand, four hundred forty".